Commonly acknowledged as the only public monument to the Devil himself.

This ancient Roman cistern has been the source of many legends throughout the centuries.

The fragmented remains of a massive public bath connected to the city's water supply.

The water of this well in Toledo lost its sweetness after the death of a young love.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

An homage to the first Spanish cyclist to win the Tour de France.

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

A controversial art piece that harkens back to local folklore.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A monument to the bloody fight against fascism in Slovakia during World War II.

A gorgeous stone viaduct crosses over a bucolic valley.

An abandoned 19th-century iron factory perched along the outskirts of an idyllic village.

Pay your respects to a country that only existed for a few weeks.

This region of Slovakia boasts some of the most plentiful opal mines in the world.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

Too much gossip or just missing curfew could land you in here for a couple of days.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

Abandoned 37.5' diameter rusted metal sphere sitting in the woods.